User guide
CME 2 User Guide    Digital Inputs and Outputs 
Copley Controls  57 
6.1.2: Digital Input Functions 
The programmable digital input functions are described below. 
Input Function 
Description 
AMP Enable- 
LO Enables with clear faults 
A low input will enable the amplifier. 
Any transition will clear latched faults and outputs. 
AMP Enable- 
HI Enables with clear faults 
A High input will enable the amplifier. 
Any transition will clear latched faults and outputs. 
AMP Enable- 
LO Enables with reset 
A low input will enable the amplifier. 
A low to High transition will reset the amplifier. 
AMP Enable- 
HI Enables with reset 
A High input will enable the amplifier. 
A High to low transition will reset the amplifier. 
AMP Enable-LO Enables 
A low input will enable the amplifier. 
AMP Enable-HI Enables 
A High input will enable the amplifier. 
Not Configured 
No function assigned to the input. 
NEG Limit-HI Inhibits* 
A High input will inhibit motion in negative direction. 
NEG Limit-LO Inhibits* 
A low input will inhibit motion in negative direction. 
POS Limit-HI Inhibits* 
A High input will inhibit motion in positive direction. 
POS Limit-LO Inhibits* 
A low input will inhibit motion in positive direction. 
Reset on LO-HI Transition 
A low to Hi transition of the input will reset the amplifier. 
Reset on HI-LO Transition 
A High to low transition of the input will reset the amplifier. 
Motor Temp HI Disables 
A High input will generate a Motor Over Temperature fault. 
Motor Temp LO Disables 
A low input will generate a Motor Over Temperature fault. 
Home Switch Active HI 
A High input indicates the home switch is activated. 
Home Switch Active LO 
A low input indicates the home switch is activated. 
Motion Abort Active HI 
A High input causes the amplifier to stop motion, using the Abort 
Deceleration rate described in Trajectory Limits (p. 131). The amplifier 
remains enabled. 
Motion Abort Active LO 
A low input causes the amplifier to stop motion, using the Abort 
Deceleration rate described in Trajectory Limits (p. 131). The amplifier 
remains enabled. 
Hi Res Analog Divide Active HI 
A High input causes the firmware to divide the level of the analog 
input signal by 8. 
Hi Res Analog Divide Active LO 
A low input causes the firmware to divide the level of the analog input 
signal by 8. 
High Speed Position Capture on 
LO-HI Transition 
Position will be captured on the low to high transition of the input. 
High Speed Position Capture on 
HI-LO Transition 
Position will be captured on the high to low transition of the input. 
PWM Sync Input 
PWM synchronization input. See Synchronizing PWM Switching 
Frequency (p. 66). (For high-speed inputs only.) 










